In the paper a nested logit model is used to describe passenger preferencesconcerning airports and airlines. A statistical model for the passengers'sequential choice of airport and airline is calibrated. It appears that thechoice sequence first airport, then airline is statistically preferable to thereversed choice sequence. Frequency, the average number of seats offered by anairline and access time to the airport are all significant. Separate models areestimated for business and leisure travelers, but there appear to be only smalldifferences.